Improvement in rotary pumps



UNITED STATES PATENT CFFrcE.

WILLIAM T. DOREMUS, OFANEW YORK, Y.

IMPROVEMENT IN n oTARvPUMPs.

Specification forming part of Letters 'Patent No. 173,215, dated February 8, 1876; application led January 15, 1876. A

and Fig. 2 is a vertical longitudinal section of the same, taken through the line a: x, Fig. 1. Similar letters' of reference indicate corresponding parts.

The object of this invention is to furnish an improved rotary pump, delivering a continuous stream of a iuid, and forcing it to any desired distance, and which shall be simple in .con-

struction and effective in operation.

The invention consists in an improved rotary pump, in which a fluid is forced through ,a flexible tube coiled around the face of a cylinder, and receiving and discharging its duid through the hollow journals ot' said cylinder by the pressure upon said tube of a second cylinder, as hereinafter fully described.

A represents the frame of the pump, in bearings in which revolves a cylinder, B. The journals ofthe cylinder B are made hollow to receive a flexible tube, C, made of rubber or other suitable inateriahwhich passes in through one journal, passes out through the hub of the cylinder B, passes through a hole or notch in the shellof said cylinder, makes a little more thanone turn around it, passes in through a hole or notch in its shell, in through a hole in its hub, and out through its other journal.

The tube C should be swiveled at the ends .of the journals of the cylinder B, to prevent'it from being twisted by the revolution ot' said cylinder, and should have a check-valve in its discharge end, to prevent any back ow of the lfluid.

The part of the tube C that passes around the cylinder B may be round or flattened, or of any form not liable .to be injured by compression.

The flexible tube need not pass through the journals of the cylinder B, but may be connected with the hub of said cylinder, and the fluid received and discharged through its journals,

Witnthel outer ends 'of which themen and'discharge pipes may be connected by swivcled joint or otherwise. i l

D is a cylinder, the journals of which revolve in bearings in a frame or yoke, E, that slides in the frame A, and has a swiveled f screw, F, connected with it, so that it may be adjusted to press thetube C against the face of the cylinderB with any desired pressure. To one of the journals of the cylinder B is attached a crankor pulley, G, for the attachment of the power.

The cylinderD may be revolved by friction, or gear-wheels may be attached to the journals of the two cylinders to mesh into each other, so'that both cylinders may be revolved with exactly the same velocity. The latter' construction is preferred, as it protects the tube from any sliding friction.

The details of construction may be varied in various ways without departing from my invention.

With this construction, as the cylinders Bl D arerevolved the tube C is compressed between their faces, which forces the fluid in front ofthe point of contact out through the discharge end ofthe tube Gf, and forlnsa vacuum in the rear of said point of contact, into which the uid is forced by atmospheric pressure, so that there will be a continuous discharge of the fluid from the discharge end of said tube O.

Havingthus described my invention, I claim as new and desire to secure by Letters Patent- VThe cylinder B, provided with hollow journals, and having a flexible tube, C, coiled around it, with its ends passed through or oo nnected with the said hollow journals, and

.through which tube and hollow journals afluid is forced by the pressure upon said tube of a second cylinder, D, substantially as herev in shown and described.'

WILLIAM T. DOREMUS.

Witnesses:

JAMES T. GRAHAM, T.'B. MosHER. 

